Postoperative serum magnesium levels as a predictor for the need for calcium replacement after total thyroidectomy: a prospective study

ABSTRACT Objective: Our aim was to assess the ability of serum magnesium (Mg), measured on the first postoperative day (Mg1PO), to predict the need for calcium (Ca) replacement in patients undergoing total thyroidectomy (TT). Subjects and methods: Eighty patients undergoing TT, with Mg1PO and PTH dosage in the first (PTH1h) and eighth (PTH8h) hours after TT, were evaluated for the need for Ca replacement. Data were evaluated by uni/multivariate logistic regression and Receiver Operating Characteristic (ROC) curve. Results: 32 patients (40%) required Ca replacement. Median PTH1h, PTH8h and Mg1PO were higher in the no replacement group: 17 versus (vs) 3 pg/mL (p < 0.001), 18.2 vs 3.0 pg/mL (p < 0.001) and 2 vs 1.6 mg/dL (p < 0.001), respectively. Mg1PO was the isolated predictor for this replacement (odds ratio = 0.0004, 95% confidence interval: 0.000003-0.04; p = 0.001), with the cut-off value of 1.8 mg/dL showing sensitivity and specificity of 78.1% and 87.5%, respectively. Conclusions: In this group of patients, serum Mg1PO was the isolated predictor for the need for Ca replacement.

Research progress of complications related to robotic thyroid surgery-comparison of TORT and BABA approaches / 中华内分泌外科杂志

In recent years, clinical applications of robotic thyroid surgery have been gradually promoted with the continuous improvement of the da Vinci robotic surgical system. Unlike traditional open surgery, robotic thyroid surgery mainly adopts remote access, which has many advantages, such as magnified high-definition 3D view and hand vibration stabilization. The rates and causes of postoperative complications differ due to different approaches, view angles, and operation sequences. This paper presents the literature on both transoral and bilateral areolar axillary approaches in robotic thyroid surgery, focusing on five common complications under both approaches, including laryngeal recurrent nerve injury and hypoparathyroidism, to provide theoretical support for the standardization of robotic thyroid surgery.

Predictive value of PTH level on day 1 after surgery for papillary thyroid carcinoma in patients with permanent hypoparathyroidism / 临床耳鼻咽喉头颈外科杂志

Objective:To investigate the relationship between parathyroid hormone（PTH） level and permanent hypoparathyroidism（PHPP） on the first day after radical papillary thyroidectomy, and its predictive value. Methods:A total of 80 patients with papillary thyroid cancer who underwent total thyroid resection and central lymph node dissection were collected and analyzed from January 2021 to January 2022. According to whether PHPP occurred after surgery, the patients were divided into hypoparathyroidism group and normal parathyroid function group, and univariate and binary logistics regression were used to analyze the correlation between PTH and serum calcium levels and PHPP on the first day after surgery in two groups. The dynamic changes of PTH at different time points after operation were analyzed. The area under the receiver operating characteristic was used to evaluate the predictive power of PTH on the development of PHPP after surgery. Results:Among the 80 patients with papillary thyroid cancer, 10 cases developed PHPP, with an incidence rate of 12.5%. Binary logistics regression analysis showed that PTH on the first postoperative day（OR=14.534, 95%CI: 2.377-88.858, P=0.004） was an independent predictive risk factor for postoperative PHPP. Taking PTH=8.75 ng/L on the first postoperative day as the cut-off value, the AUC of the area under the curve was 0.874（95%CI: 0.790-0.958, P<0.001）, the sensitivity was 71.4%, the specificity was 100%, and the Yoden index was 0.714. Conclusion:PTH level on the first day after total thyroid papillary carcinoma surgery is closely related to PHPP, and is an independent predictor of PHPP.

The effects of adequate dietary calcium intake in patients with hypoparathyroidism non-adherent to treatment: a prospective randomized controlled trial

SUMMARY OBJECTIVE: A significant problem that compels clinicians in the conventional treatment of hypoparathyroidism is patients' non-adherence to treatment. This study aimed to evaluate the effects of adequate Ca intake with dietary recommendations among hypoparathyroidism patients who persistently use Ca supplementation irregularly on plasma Ca and phosphate levels. METHODS: This prospective, randomized, controlled study was conducted on patients diagnosed with chronic hypoparathyroidism who persistently interrupt Ca supplementation therapy and therefore have a hypocalcemic course. Patients with a total daily Ca intake below 800 mg were randomized. All patients were advised to keep the doses of active vitamin D and Ca supplements they were currently using. The patients in the study group (n=32) were advised to consume 1,000-1,200 mg of Ca daily, and the patients in the control group (n=35) were advised to continue their diet according to their daily habits. After 12 weeks of follow-up, the patients' laboratory values were compared between groups to assess treatment goals. RESULTS: The mean of the total Ca level was 8.56±0.36 mg/dL in the study group and was found to be significantly higher than that in the control group, which was 7.67±0.48 mg/dL (p<0.001). The mean serum phosphate and serum Ca-P product levels were significantly higher in the study group (p<0.001) but did not exceed the safe upper limits in any patient. CONCLUSION: A suitable increase in dietary Ca intake could effectively control hypocalcemia in patients with hypoparathyroidism who persistently interrupt the recommended calcium supplementation.

Síndromes poliglandulares autoimunes: uma revisão geral em busca novas evidências / Autoimmune polyglandular syndromes: a general review in search of new evidence / Síndromes poliglandulares autoinmunes: una visión general de la búsqueda de nuevas evidencias

As Síndromes Poliglandulares Autoimunes (SPA) são consideradas endocrinopatias raras em que ocorrem alterações autoimunes nas glândulas endócrinas, acompanhadas de outras doenças não endócrinas. Tendo em vista a complexidade de associações em cada subtipo, suas particularidades e gênese dos mecanismos envolvidos, este artigo busca, através de uma meta-analise, equacionar seus aspectos descritivos mais atuais e importantes para a prática clínica. As SPA podem ser classificadas nos tipos I, II, III e IV de acordo com a idade de início e os órgãos afetados. Interações complexas entre fatores genéticos, epigenéticos e ambientais provavelmente contribuem para o desenvolvimento dessas síndromes, que idealmente devem ser diagnosticadas em estágios iniciais, dada a sua alta morbidade e mortalidade. O tratamento adequado de cada uma das alterações é essencial para preservar a qualidade de vida dos pacientes.

Autoimmune Polyglandular Syndromes (APS) are considered rare endocrinopathies characterized by autoimmune alterations in the endocrine glands, accompanied by other non-endocrine diseases. Bearing in mind the complexity of associations in each subtype, its particularities and the genesis of the mechanisms involved, this article seeks, through meta-analysis, to equate its most current and important descriptive aspects for clinical practice. APS can be classified into types I, II, III and IV according to age of onset and affected organs. Complex interactions between genetic, epigenetic, and environmental factors likely contribute to the development of these syndromes, which ideally should be diagnosed at an early stage, given their high morbidity and mortality. Appropriate treatment of each of the alterations is essential to preserve the quality of life of patients.

Los Síndromes Polilandulares Autoinmunes (SPA) se consideran endocrinopatías raras en las que se producen cambios autoinmunes en las glándulas endocrinas, acompañadas de otras enfermedades no endocrinas. En vista de la complejidad de las asociaciones en cada subtipo, sus particularidades y la génesis de los mecanismos involucrados, este artículo busca, a través de un metaanálisis, considerar sus aspectos descriptivos más actualizados e importantes para la práctica clínica. Las ZEPA podrán clasificarse en los tipos I, II, III y IV según la edad de inicio y los órganos afectados. Las complejas interacciones entre los factores genéticos, epigenéticos y ambientales probablemente contribuyan al desarrollo de estos síndromes, que idealmente deberían ser diagnosticados en etapas tempranas, dada su alta morbilidad y mortalidad. El tratamiento adecuado de cada cambio es esencial para preservar la calidad de vida de los pacientes.

Valor pronóstico de la parathormona postoperatoria de 24 horas en el manejo de la hipocalcemia tras tiroidectomía total en un hospital de Valencia durante 2012-2019

Introducción: La hipocalcemia por hipoparatiroidismo es la complicación más frecuente tras tiroidectomía total. Un factor predictor importante de hipocalcemia es la parathormona postoperatoria, pero el momento en el que otorga mejores resultados predictivos aún se discute. Objetivo: El objetivo es analizar el valor pronóstico de la parathormona postoperatoria a las 24 horas como indicador de hipocalcemia, en comparación con la seriación de los niveles de calcio. Metodología: Estudio observacional retrospectivo y descriptivo de 297 pacientes intervenidos de tiroidectomía total durante ocho años. Los pacientes fueron clasificados en tres grupos de riesgo según la parathormona postoperatoria (alto, medio y bajo riesgo). Para comparar la parathormona frente al calcio postoperatorio como predictor de hipocalcemia, se obtuvieron curvas ROC y áreas debajo de la curva. Resultados: El riesgo relativo de tener hipocalcemia con parathormona ≤15 pg/mL es de 353,4 (p = 0,00). La prueba de parathormona postoperatoria (≤15 pg/mL a las 24 h) obtuvo una sensibilidad del 96,25 % para la detección de hipocalcemia, especificidad del 94,06 % y precisión global del 95,03 %. El grupo de alto riesgo (parathormona ≤15 pg/mL) concentra la mayoría de los pacientes con hipocalcemia, y abarca la totalidad de los casos permanentes. Conclusiones: La parathormona postoperatoria a las 24 horas de la tiroidectomía total es un test con un valor pronóstico considerable, capaz de predecir el riesgo de hipocalcemia postquirúrgica. Se encontró que los pacientes con parathormona >15 pg/mL pueden ser dados de alta de manera segura.

Introduction: Hypocalcemia due to hypoparathyroidism is the most frequent complication after total thyroidectomy. An important predictive factor of hypocalcaemia is postoperative parathormone (PTH), but the optimal time for testing PTH levels is under discussion. Objectives: The objective is to analyze the prognostic value of postoperative PTH at 24 hours as an indicator of hypocalcaemia, compared to serum calcium levels. Methodology: Descriptive retrospective observational study of 297 patients who underwent total thyroidectomy over an 8-year period. The patients were classified into 3 risk groups according to postoperative parathormone (high, medium and low risk). To compare parathormone versus postoperative calcium as a predictor of hypocalcemia, ROC curves and areas under the curve (AUC) were obtained. Results: The relative risk of having hypocalcemia with parathormone ≤ 15 pg/mL is 353.4 (p = 0.00). The postoperative parathormone test (≤ 15 pg / mL at 24h) obtained a sensitivity of 96.25% for the detection of hypocalcemia, specificity of 94.06% and global precision of 95.03%. The high-risk group (parathormone ≤ 15 pg/mL) accounts for the vast majority of patients with hypocalcemia and covers all permanent cases. Conclusions: Postoperative levels 24 hours after total thyroidectomy is a test with considerable prognostic value, capable of predicting the risk of postsurgical hypocalcemia. Patients with levels over > 15 pg/mL can be safely discharged.

Hypoparathyroidism and Fahr's syndrome: case series / Hipoparatireoidismo e síndrome de Fahr: série de casos

Abstract Hypoparathyroidism (HP) is a rare metabolic disorder and causes hypocalcemia because parathyroid hormone secretion is inadequate to mobilize calcium from bone and reabsorb calcium from kidney and gut. Anterior neck surgery is the most common cause of acquired HP and autoimmune HP is the next most common form in adults. The duration, severity, and rate of development of hypocalcemia determine the clinical presentation. A variety of organs can be affected by calcification, more frequently kidneys, but also joints, eyes, skin, vasculature, and other organ systems and, although rarely seen, intracerebral calcifications. We report four cases of bilateral basal ganglia calcifications (BGC) also known as Fahr's syndrome related to hypoparathyroidism. Fahr's syndrome is characterized by bilateral symmetrical calcification of areas of the brain that control movements including basal ganglia, thalamus, and others; it is a rare inherited or sporadic neurological disorder with a prevalence of less than 1/1.000.000. Main symptoms related to bilateral BGC include extra-pyramidal and cerebellar disorders, cognitive impairment, epileptic seizures, and psychiatric changes. BGC has been established as a possible outcome of HP. Its prevalence, demonstrated in the HP cohorts, varied significantly from 12 up to 74%. Currently, computed tomography (CT) is the most valuable method for diagnosis. The treatment include symptomatic support and identification of causes, but there is no specific treatment limiting the progression of calcification in the basal ganglia. Especially in HP, an early treatment can prevent calcification and neurophysiological disorders.

Resumo O hipoparatireoidismo (HP) é um distúrbio metabólico raro e causa hipocalcemia, pois a secreção do paratormônio é inadequada para mobilizar o cálcio dos ossos e reabsorver o cálcio dos rins e intestino. A cirurgia cervical anterior é a causa mais comum de HP adquirido. O HP autoimune é a segunda causa mais comum em adultos. A duração, gravidade e taxa de desenvolvimento da hipocalcemia determinam a apresentação clínica. Diversos órgãos podem ser afetados pela calcificação, mais frequentemente os rins, mas também articulações, olhos, pele, vasculatura e outros órgãos e, embora raramente vista, calcificações intracerebrais. Relatamos quatro casos de calcificações dos gânglios da base (CGB) bilaterais, também conhecidas como síndrome de Fahr relacionadas ao hipoparatireoidismo. A síndrome de Fahr é caracterizada pela calcificação bilateral simétrica de áreas do cérebro que controlam os movimentos incluindo os gânglios da base, tálamo e outros; é um distúrbio neurológico raro, hereditário ou esporádico, com uma prevalência 1/1.000.000. Os principais sintomas relacionados à CGB bilateral incluem distúrbios extrapiramidais e cerebelares, comprometimento cognitivo, convulsões e alterações psiquiátricas. A CGB foi estabelecida como uma possível consequência do HP. Sua prevalência, demonstrada nas coortes de HP, variou significativamente de 12 a 74%. Atualmente, a tomografia computadorizada (TC) é o método mais valioso para o diagnóstico. O tratamento inclui suporte sintomático e identificação de causas, mas não há tratamento específico limitando a progressão da calcificação nos gânglios da base. Especialmente no HP, um tratamento precoce pode prevenir calcificações e distúrbios neurofisiológicos.

Hypoparathyroidism: update of guidelines from the 2022 International Task Force

ABSTRACT The 2022 International Task Force guidelines for chronic hypoparathyroidism will be published within several months in the Journal of Bone and Mineral Research. These guidelines update the original guidelines published in 2016, and include new information from literature published since then. Chronic postsurgical hypoparathyroidism is now defined as lasting for at least 12 months after surgery, rather than 6 months. Chronic postsurgical hypoparathyroidism may be predicted by serum PTH <10 pg/mL in the first 12-24 hours after surgery. The most common symptoms and complications of chronic hypoparathyroidism based on the literature are summarized in detail. How to monitor and manage patients with hypoparathyroidism is described in detail where recommendations can be given. These guidelines are intended to frame the diagnosis and care of patients with chronic hypoparathyroidism for at least the next five years.

Skeletal and nonskeletal consequences of hypoparathyroidism

ABSTRACT Hypoparathyroidism, despite the conventional therapy with calcium and active vitamin D, can lead to skeletal and nonskeletal abnormalities. Chronic hypoparathyroidism is associated with a significant reduction in bone remodeling, increases in areal and volumetric bone density, and improvement in trabecular microarchitecture and in trabecular bone score. Regardless of these advantages in bone mass and microarchitecture, recent data suggest an increased vertebral fracture risk in patients with nonsurgical hypoparathyroidism. Moreover, chronic hypoparathyroidism can lead to abnormalities in multiple organ systems, including the neurological, cardiovascular, renal, neuropsychiatric, ocular, and immune systems. Nephrocalcinosis, nephrolithiasis, and renal insufficiency, as well as decreased quality of life and cataracts, are common in patients with hypoparathyroidism. An increased incidence of hospitalization due to infections and a greater risk of cardiovascular diseases are observed in patients with hypoparathyroidism, particularly in those with nonsurgical disease. All these abnormalities may be because of the disease itself or complications of therapy. We herein reviewed the skeletal and nonskeletal consequences of hypoparathyroidism in patients conventionally managed with calcium and active vitamin D.

Treatment options in hypoparathyroidism

ABSTRACT Hypoparathyroidism remains the single endocrine deficiency disease that is not habitually treated with the missing hormone. In this article, we aim to provide a review of the conventional approach and the novel therapies as well as an overview of the perspectives on the treatment of this rare condition. We conducted a literature review on the conventional therapy using vitamin D analogs and calcium salts, indications for thiazide diuretics and phosphorus binders, PTH analogs history and usage, and the drugs that are currently being tested in clinical trials. Conventional treatment involves calcium salts and vitamin D analogs. Thiazide diuretics can be used to reduce hypercalciuria in some cases. A low-phosphate diet is recommended, and phosphate binders are rarely needed. During pregnancy, a careful approach is necessary. The use of PTH analogs is a new approach despite the limitation of high cost. Studies have included modified PTH molecules, calcilytics, microencapsulation of human parathyroid cells, and allotransplantation.

Parkinsonism secondary to iatrogenic hypoparathyroidism

Parkinsonism is a clinical syndrome characterized by bradykinesia, rigidity, and tremor. Many causes have been identified for secondary parkinsonism. Among them, hypocalcemia due to hypoparathyroidism is one of the rarer causes. Here, we emphasized a patient presented with reversible secondary parkinsonism caused by hypocalcemia due to iatrogenic hypoparathyroidism following thyroidectomy. A 56-year-old female diagnosed with hypothyroidism and parkinsonism was admitted following a lower respiratory tract infection. She had undergone a total thyroidectomy 10 years ago, following which there were intermittent episodes of hypocalcemia. The patient was found to have hypocalcemia, hypophosphatemia, and low parathyroid hormone level. The noncontrast computed tomography of the brain showed diffuse brain calcification with a predilection to basal ganglia. Her diagnosis was refined as parkinsonism due to cerebral calcification secondary to iatrogenic hypoparathyroidism. This case emphasized the importance of evaluating treatable secondary causes of parkinsonism at diagnosis.

Selecting the Right Plane of Dissection in Thyroidectomy: Along the Recurrent Laryngeal Nerve or the Thyroid Capsule? A Retrospective Analysis

Abstract Introduction Total thyroidectomy remains highly technical, with a significant risk of recurrent laryngeal nerve (RLN) compromise and hypoparathyroidism. After identifying RLN, at the level of the ligament of Berry, local factors may compel the surgeon to either dissect along the nerve or the thyroid capsule. Objective The objective of the present study is to compare these two approaches in terms of outcomes and complication rates. Methods This is a retrospective analysis from September, 2013 to April 2019 of 511 consecutive patients undergoing thyroidectomy. General demographics and disease parameters were recorded. At the discretion of the surgeon and according to the demands of the local operative factors, the patients either had dissection along the RLN or along the thyroid capsule. Perioperative and postoperative parameters such as blood loss, duration of surgery, hospital stay, pain scores, analgesia requirements and complications were recorded. The groups were compared with the Pearson chi-squared test or with the Fisher exact test. A p-value < 0.05 was considered statistically significant. Results The incidence of transient hypocalcaemia and transient RLN compromise were higher when dissection was performed along the nerve as opposed to the plane along the thyroid capsule. Other parameters including operative time, hospital stay, pain scores, analgesia requirement, wound infection, seroma, hemorrhage, and recurrence did not differ between the groups. Subgroup analysis of the patients who presented with complications showed that local factors, malignancy, and extent of surgery correlated positively with complications when dissected along the RLN. Conclusion Dissection along the capsule of the thyroid during thyroidectomy is a safer plane in terms of low rate of transient RLN injury and hypoparathyroidism as opposed to dissection along the nerve.

Clinical significance of monitoring parathyroid hormone in drainage fluid and serum after total thyroidectomy / 中华内分泌外科杂志

Objective:To observe the effect of different clinical factors on the level of parathyroid hormone (PTH) and to predict the possibility of permanent hypothyroidism (PHP) after total thyroidectomy (TT) by monitoring the levels of PTH in serum and drainage fluid after TT.Methods:Retrospective analysis was made on 150 patients who underwent TT for papillary thyroid carcinoma (PTC) in the Department of Thyroid Head and Neck Surgery in Jilin Cancer Hospital from Jan. 2020 to Aug. 2021. The changes of serum PTH were recorded at 1, 3, 7, 30 days and 6 months after surgery. The risk factors of postoperative hypoparathyroidism (HP) were investigated by single factor and multi factor methods. The impairment of parathyroid function was predicted combined with the level of PTH in the drainage fluid 1 day after operation.Results:After TT, serum PTH returned to normal value in most patients 1 month after operation. The proportion of PHP was 3.33% (5/150). Univariate analysis showed that bilateral central lymph node dissection, Hashimoto’s thyroiditis, tumor diameter ≥2 cm and intraoperative selective parathyroid autologous transplantation were risk factors for temporary hypoparathyroidism (THP). Multivariate analysis showed that BCND ( OR=0.322, P=0.001) , intraoperative selective parathyroid autograft ( OR=5.442, P=0.001) and tumor diameter ≥2 cm ( OR=2.247, P=0.003) were independent risk factors for THP. ROC curve was used to compare the predictive effect of postoperative serum and drainage PTH levels on postoperative PHP. The statistical results showed that the highest predictive effect of postoperative PHP was found on the first day of drainage PTH level within 1 week after operation (AUC 0.81) . 54 cases whose serum PTH was lower than normal value on the first day after operation were divided into 4 groups according to the level of PTH in drainage fluid from high to low. The results showed that the lower the level of PTH in drainage fluid, the greater the possibility of PHP ( P<0.05). Conclusions:Most of the patients with low PTH one month after operation develop PHP, while bilateral central lymph node dissection, intraoperative selective parathyroid transplantation, tumor diameter ≥2 cm are risk factors for THP after TT. If the serum PTH is lower than the normal value on the first day after operation, there is a possibility of PTH. The lower the PTH in the drainage fluid, the greater the possibility of PHP, which should be paid attention to in clinical practice.

Predictive value of parathyroid hormone decline rate for permanent hypoparathyroidism after thyroidectomy / 中华内分泌外科杂志

Objective:To investigate the value of the decrease rate of parathyroid hormone (PTH) in predicting permanent hypoparathyroidism (PHP) in one month after operation of papillary thyroid carcinoma (PTC) .Methods:The clinical data of 322 patients with PTC who underwent at least total thyroidectomy and unilateral central lymph node dissection in the Thyroid Surgery Center of West China Hospital of Sichuan University from Jan. 2013 to Jun. 2018 were retrospectively analyzed. There were 257 women and 65 men. According to the time when PTH returned to normal, they were divided into 307 cases in the temporary hypoparathyroidism (THP) group and 15 cases in the PHP group. The decrease rate of PTH and the incidence of hypoparathyroidism in one month after operation were counted, the clinical characteristics and operation information were observed, and the risk factors of PHP were analyzed. SPSS 23.0 statistical software was used for data processing. χ 2 test and t test were used for comparison between THP and PHP. The related factors were analyzed by multivariate logistic regression. Results:307 cases of THP and 15 cases of PHP were included. Multivariate logistic analysis showed that age ≥ 55 years old ( OR, 35.193; 95% CI, 2.936 - 421.870; P=0.005) and PTH before operation closer to normal lower limit ( OR, 2.349; 95% CI, 1.161 - 4.755; P = 0.018) were independent risk factors for PHP. Patients with PHP had a higher rate of PTH decline in 1 month after operation ( OR, 373.439; 95% CI, 26.568 - 5248.983; P=0.000) . The ROC curve showed that the sensitivity and specificity of predicting PHP were 86.7% and 94.8% respectively. Conclusions:The age of patients with PTC ≥ 55 years old and PTH before operation closer to normal lower limit are independent risk factors for the occurrence of PHP. The decline rate of PTH in one month after operation which more than 73.2% can predict PHP.

Application of da Vinci robotics in thyroid surgery: a summary of clinical experience of 304 cases in a single center / 中华内分泌外科杂志

Objective:To investigate the clinical effectiveness of da Vinci robotics in thyroid surgery.Methods:304 cases of robotic thyroid surgery performed by the same experienced surgeon at the Department of Thyroid Surgery, China-Japan Union Hospital of Jilin University during the period from Apr. 3, 2020 to Nov. 5, 2021 were prospectively included, and the operation time, operation type, postoperative drainage, postoperative hospital stay, total number of lymph node dissection and number of positive lymph nodes, operation complications, and postoperative pain level of all patients were counted. The learning curve was plotted by applying the moving average method, divided into the initial stage and the mature stage, and the differences in surgical outcomes and surgical complications between the two stages were compared. SPSS 23.0 was applied for statistical analysis, and t-test and Mann-Whitney U test were used for comparison of measurement data, and χ2 test was used for comparison of count data. Result:All surgeries were completed successfully without conversion to open cases, including 29 males and 275 females, with a mean age of (33.8±8.9) years and a range of 27-41 years. The mean body mass index (BMI) was (22.9±3.6) kg/m 2 and a range of 20.5-25.4 kg/m 2. The median operative time was 140 min, the median postoperative drainage was 52.5 ml, and the median postoperative hospital stay was 3 days. The mean number of lymph nodes cleared was 4.4±3.5, and the mean number of positive lymph nodes was 0.9±1.7. The incidence of postoperative transient laryngeal nerve (RLN) injury was 3.3%, and the incidence of transient hypoparathyroidism was 0.7%. A significant decrease in operative time occurred after the 26th case and subsequently stabilized. Compared with the initial stage of the learning curve, the mature stage had a shorter operative time (146.0±36.5 vs 198.7±56.7 min, P<0.001) , a lower incidence of temporary RLN injury (2.5% vs 11.5%, P<0.05) , and a lower percentage of benign tumor surgery (12.2% vs 26.9%, P<0.05) . Conclusion:The application of robotic technology in thyroid surgery is safe and reliable, and its successful implementation should follow a corresponding learning curve, from easy to difficult, with different surgical approaches selected according to the patient’s condition, wishes, and the operator’s technical level.

Incidencia de hipocalcemia e hipoparatiroidismo en cirugías de cuello / Hypocalcaemia and hypoparathyroidism' incidence in neck surgeries

INTRODUCCIÓN: el hipoparatiroidismo es la alteración causada por hipofunción de las glándulas paratiroides y la causa más común es la posquirúrgica. OBJETIVO: conocer la incidencia de hipocalcemia dentro de las 72 horas del postoperatorio y de hipoparatiroidismo permanente de tiroidectomías en nueve años. SUJETOS Y MÉTODO: estudio observacional, descriptivo y retrospectivo de pacientes con tiroidectomías entre enero de 2011 y diciembre de 2019 en el Hospital de Clínicas. Se dividió la muestra por grupos etarios, se consideró hipocalcemia a valores ≤8,5 mg/dl e hipoparatiroidismo permanente cuando persistían por lo menos un año luego de cirugía. RESULTADOS: fueron 202 pacientes, 182 mujeres y 20 hombres, media de edad ± ES para mujeres 47.3±1.2 años y para hombres 55.1±3.4. El 61,5% presentó hipocalcemia en las primeras 72 horas del postoperatorio: 60,2% de mujeres y 71,4% de hombres (p=0.42). El 79% fueron hipocalcemias asintomáticas, 7,5% tuvo síntomas y 13,5% sin datos. El signo de Trousseau fue negativo 68% y positivo en 9%. Respecto a la patología hubo 107 resultados benignos, 94 malignos. CONCLUSIONES: el 90% fueron mujeres, 6 de cada 10 presentaron hipocalcemia en las primeras 72hs, en la gran mayoría fueron asintomáticas y tuvieron signo de Trousseau negativo. No hubo correlación entre hipocalcemia con edad, sexo, duración o tiempo de la cirugía, ni resultado de patología. La incidencia de hipoparatiroidismo transitorio fue 75,7% y permanente 7,3%. Cuando no hubo hipoparatiroidismo transitorio tampoco hubo hipoparatiroidismo permanente.

INTRODUCTION: hypoparathyroidism is the alteration caused by hypofunction of the parathyroid glands and the most common cause is post-surgery. OBJECTIVE: to know the incidence of hypocalcaemia within 72 hours of the postoperative period and of permanent hypoparathyroidism of thyroidectomies in nine years. SUBJECTS AND METHOD: observational, descriptive and retrospective study of patients with thyroidectomies between January 2011 and December 2019 at Clinical's Hospital. The sample was divided by age groups, hypocalcemia was considered at values ≤8.5 mg/dl and permanent hypoparathyroidism when they persisted for at least one year after surgery. RESULTS: there were 202 patients, 182 women and 20 men, mean age ± SE for women 47.3±1.2 years and for men 55.1±3.4. 61.5% presented hypocalcaemia in the first 72 hours after surgery: 60.2% of women and 71.4% of men (p=0.42). 79% were asymptomatic hypocalcemia, 7.5% had symptoms and 13.5% without data. Trousseau's sign was negative in 68% and positive in 9%. Regarding the pathology, there were 107 benign results, 94 malignant. CONCLUSIONS: 90% were women, 6 out of 10 presented hypocalcemia in the first 72 hours, the vast majority were asymptomatic and had a negative Trousseau sign. There was no correlation between hypocalcaemia with age, sex, duration or time of surgery, or pathology result. The incidence of transient hypoparathyroidism was 75.7% and permanent 7.3%. When there was no transient hypoparathyroidism, there was also no permanent hypoparathyroidism.

Clinical characteristics and molecular mechanisms of hypoparathyroidism related to GATA3 gene mutation / 中华内科杂志

Objective:To analyze the clinical characteristics and molecular mechanisms of 5 cases of hypoparathyroidism caused by GATA3 gene mutation.Methods:A total of 5 childhood-onset hypoparathyroidism patients with GATA3 mutation were identified from 198 hypoparathyroidism (aged ≤18 years) from 1975 to 2021 in Peking Union Medical College Hospital. Clinical data and biochemical indices of the 5 patients were collected and analyzed retrospectively. Genetic screening was conducted by targeted next-generation sequencing (T-NGS), and bioinformatics analysis was performed to analyze the underline mechanisms.Results:The medium onset age of hypoparathyroidism of the 5 patients was 0.5 (0.1, 1.3) years old, and the time duration from onset to confirmed diagnosis of hypoparathyroidism and hypoparathyroidism- deafness-renal dysplasia syndrome was (7.0±5.2) years and (15.0±5.4) years, respectively. The clinical manifestations included carpopedal spasm accompanied by seizures (5 cases), basal ganglia calcification (5 cases), cataract (1 case), deafness (4 cases), and renal malformations or absence (2 cases). The blood calcium and blood parathormone(PTH) before treatment was (1.65±0.31) mmol/L and (4.64±2.63) ng/L, respectively. The 5 patients carried different heterozygous mutations in GATA3 gene, which caused nonsense mutations, frameshift mutations and splice site mutations, respectively. All the GATA3 gene mutations of the 5 patients are classified as pathogenic or likely pathogenic by the Clin Var database and American College of Medical Genetics and Genomics(ACMG).Conclusions:Attention should be paid to genetic diseases in patients with childhood-onset hypoparathyroidism. The possibility of hypoparathyroidism-deafness-renal dysplasia syndrome should be considered in hypoparathyroidism patients with hearing loss or renal dysplasia. GATA3 gene screening is highly recommended for the confirmation of the diagnosis.

Clinical management of primary hypomagnesemia with secondary hypocalcemia / 中华内分泌代谢杂志

Primary hypomagnesemia with secondary hypocalcemia(HSH) is a rare cause of hypoparathyroidism. This article presents a case of a 26-year-old male with recurrent generalized weakness and tetany, and a literature review of diagnosis and treatment of primary HSH. The biochemical tests revealed the patient had severe hypomagnesemia, mild hypocalcemia, hypokalemia, and hypoparathyroidism. Transient receptor potential melastatin-6(TRPM6) gene mutation were detected by gene test, which confirmed the diagnosis of primary HSH. The patient had been treated with long term oral magnesium supplementation, who remained asymptomatic during the follow-up. Primary HSH is a rare autosomal-recessive disorder caused by mutations in the TRPM6 gene which encoding a magnesium permeable channel expressed in the intestine and the kidney. The primary defect is impaired intestinal absorption of magnesium with secondary renal excretion, leading to a series of clinical symptoms. The treatment is mainly through lifelong magnesium supplementation.

Efficacy of different surgical methods in the treatment of papillary thyroid carcinoma of the isthmus and their effects on parathyroid function and thyroglobulin / 中国基层医药

Objective:To investigate the therapeutic effects of different surgical methods on papillary thyroid carcinoma of the isthmus (PTCI) and their effects on parathyroid function and thyroglobulin.Methods:Eighty patients with PTCI who underwent treatment in Zhejiang Xin'an International Hospital from January 2016 to January 2021 were included in this study. They were randomly allocated to undergo ipsilateral lobectomy with removal of the isthmus combined with ipsilateral central neck lymph node dissection (group A, n = 40) or total thyroidectomy combined with ipsilateral central neck lymph node dissection (group B, n = 40). We compared intraoperative and postoperative conditions, complications, and hypoparathyroidism between the two groups. We also compared serum thyroglobulin level measured before and 3 days after surgery between the two groups. Results:Operative time was significantly shorter in group A than in group B [(78.95 ± 13.52) minutes vs. (104.23 ± 27.38) minutes, t = -5.23, P < 0.05]. Intraoperative blood loss was significantly less in group A than in group B [(52.32 ± 6.59) mL vs. (75.41 ± 9.98) mL, t = -12.21, P < 0.05]. There were no significant differences in voice handicap index and reflux symptom index scores between the two groups (both P > 0.05). The incidence of complications was significantly lower in group A than in group B (10.00% vs. 30.00%, χ2 = 5.00, P < 0.05). The incidence of hypoparathyroidism was significantly lower in group A than in group B (7.50% vs. 27.50%, χ2 = 5.54, P < 0.05). At 3 days after surgery, serum thyroglobulin level was significantly lower in group A than in group B [(0.82 ± 0.17) μg/L vs. (1.26 ± 0.23) μg/L, t = -9.73, P < 0.05]. Conclusion:Ipsilateral lobectomy with removal of the isthmus combined with ipsilateral central neck lymph node dissection is more effective on PTCI than total thyroidectomy combined with ipsilateral central neck lymph node dissection. The former has little effect on parathyroid function and can reduce serum thyroglobulin level. The study is highly innovative and scientific.

Effect of preoperative 25 hydroxyvitamin D deficiency on posoperative parathyroid function in patients with papillary thyroid cancer / 中华内分泌外科杂志

Objective:To investigate the effect of 25 hydroxyvitamin D [25 (OH) D] on postoperative parathyroid function in patients with papillary thyroid carcinoma (PTC) .Methods:426 patients who diagnosed as PTC and underwent at least total thyroidectomy plus central lymph node dissection (including lateral lymph node dissection) in Center of Thyroid and Parathyroid Surgery of West China Hospital, Sichuan University, from Jun. 2017 to Sep. 2019 were retrospectively analyzed. Among them, 313 were women and 113 were men, they were divided into vitamin D deficient (VDD) group ( n=297) and normal group ( n=129) according to preoperative 25 (OH) D levels ≤ 20ng/ml and > 20ng/ml. SPSS 23.0 statistical software was used for data processing. Pearson χ2 test or Fisher exact test were used to compare the incidence of clinical hypoparathyroidism, biochemical temporary and biochemical permanent hypoparathyroidism between the two groups. Univariate and multivariate logistic regression analysis were used to analyze the related factors of postoperative hypoparathyroidism between the two groups. Results:Preoperative 25 (OH) D level was significantly correlated with postoperative biochemical temporary hypoparathyroidism ( P=0.04, OR=1.11) . Compared with patients with adequate preoperative vitamin D, preoperative vitamin D deficiency increased the risk of biochemical transient hypoparathyroidism by 6.67 times ( P=0.03;OR=6.67) . There was no significant correlation between preoperative vitamin D deficiency and early postoperative clinical hypoparathyroidism (2.7% vs 3.9%, P=0.55) . Conclusion:Correction of vitamin D deficiency before operation may reduce the incidence of postoperative temporary hypoparathyroidism caused by 25 (OH) D deficiency.